KR20130042190A - Burner for pellet boiler - Google Patents

Abstract

PURPOSE: A burner for a pellet boiler is provided to equally combust pellets by rotatably installing a combustion drum. CONSTITUTION: A burner for a pellet boiler comprises a combustion drum(30), a pellet supply pipe(50), an ignition device(70), a ventilation fan(80), and a driving motor(40). The combustion drum is rotatably installed in the inner side of a combustion casing. The pellet supply pipe injects fuel pellets into the inner side of the combustion drum. The ignition device ignites the fuel pellets. The ventilation fan supplies outside air for smoothly combusting the fuel pellets. The driving motor rotates the combustion drum when combusting the fuel pellets.

Description

Burner for pellet boiler

The present invention relates to a burner for a pellet boiler which releases heat energy generated by burning fuel pellets into a heat exchange chamber of a pellet boiler so as to exchange heat with water, and more particularly, by rotating a combustion drum into which fuel pellets are injected. The present invention relates to a burner for a pellet boiler capable of maximizing thermal efficiency by promoting complete combustion of the pellet.

In general, pellet boilers use pellets produced in a constant size by crushing by-products from wood or sawmills produced in forests with sawdust and then compressed to high temperature and pressure.

Such a pellet boiler is divided into a heat exchange tank in which a hopper in which fuel pellets are stored, a burner for burning the fuel pellets to generate heat energy, and a heat exchange pipe through which water is circulated in the internal heat exchange chamber.

And a pellet supply pipe for supplying fuel pellets stored in the hopper to the burner, an ignition device for igniting the fuel pellets injected into the burner, and a blowing fan for supplying external air to smoothly burn the fuel pellets. .

The pellet boiler as described above is to discharge heat energy generated by burning the fuel pellets in the burner to the heat exchange chamber of the pellet boiler so as to exchange heat with water.

Conventional technologies for pellet boilers include the 'industrial boiler' of the Korean Patent Office Publication No. 10-2010-0127505 (Dec. 6, 2010), and the Korean Patent Registration No. 10-1004637 (2010.12.22). Pellet Boiler has been disclosed.

Here, the conventional pellet boiler which uses a pellet as a fuel is made to burn the pellet put into a burner in a fixed container.

As described above, the conventional burner for pellet boilers that burns the pellets contained in the fixed container includes a 'safety burner using wood chips or pellets' as disclosed in Korean Patent Application Publication No. 10-0765689 (October 02, 2007). Flashback prevention device for solid fuel combustor of Patent Publication No. 10-2010-0131040 (2010.12.15) and Pellet boiler of Publication No. 10-2011-0066258 (June 17, 2011) Pellet burners' have been disclosed.

A pellet boiler burner in which a pellet is burned in such a fixed container has ashes generated during the combustion of the pellets accumulated in the fixed container for a long time to be petrified, resulting in deformation of the inside of the fixed container, causing combustion. There was a problem that the efficiency is lowered.

In addition, thermal efficiency is lowered due to incomplete combustion of pellets, and there is a problem of causing pollution of the air environment with waste of fuel pellets.

In addition, the ash generated during the combustion of the pellets is petrified in the fixed container, and incomplete combustion is continued, resulting in a high failure rate of the pellet boiler and the need to clean the burner twice a week.

Korea Patent Office (KR) Registration Patent Publication (B1) Registration No. 10-0765689 Publication Date 2007.10.02. Safety burners fueled by wood chips or pellets. Korean Patent Office (KR) Publication No. 10-2010-0131040 Publication Date 2010.12.15. Flashback Arrestor for solid fuel combustors. Korean Patent Office (KR) Publication No. 10-2011-0066258 Publication Date 2011.06.17. Pellet burner for pellet boilers.

The present invention was created in order to solve the problems of the conventional pellet boiler burner as described above, the present invention by installing the combustion drum in which the fuel pellet is injected to enable a rotational operation, a predetermined amount accommodated inside the combustion drum during combustion of the pellet It is an object of the present invention to provide a burner for a new type of boiler that allows the pellets of the mixture to be combusted evenly and prevents ash generated during combustion of the pellets from accumulating inside the combustion drum to be petrified.

According to a feature of the present invention for achieving the above object,

The present invention provides a burner for a pellet boiler, which burns fuel pellets introduced into a combustion casing and discharges thermal energy generated by combustion of the pellets into a heat exchange chamber of the pellet boiler.

A combustion drum rotatably installed inside the combustion casing;

A pellet supply pipe for injecting fuel pellets into the combustion drum;

An ignition device for igniting fuel pellets injected into the combustion drum;

A blowing fan for supplying outside air to facilitate combustion of the fuel pellets;

A pellet boiler burner comprising a drive motor for rotating the combustion drum during combustion of fuel pellets is a problem solving means.

On the other hand, the present invention is a pellet boiler burner that burns fuel pellets injected into the combustion drum and releases heat energy generated by the combustion of the pellets into the heat exchange chamber of the pellet boiler.

A combustion casing provided with a combustion drum rotatably provided therein and having a discharge hole formed at a front thereof so that heat energy generated from the combustion drum can be discharged into the heat exchange chamber;

An air supply casing having an open front surface coupled to a rear surface of the combustion casing and having an air chamber into which external air is injected;

A pellet supply pipe connected to the rear surface of the combustion casing from an upper surface of the air supply casing to inject fuel pellets into the combustion drum;

An ignition device coupled to the combustion casing rear surface and igniting fuel pellets injected into the combustion drum;

A blowing fan coupled to the rear of the air supply casing to inject external air into the air chamber;

A pellet boiler burner, which is coupled to a rear surface of an air supply casing and configured to rotate a combustion drum connected to a drive shaft, is a problem solving means.

In the present invention as described above, the combustion drum is formed of a cylindrical perforated plate of the front, rear opening, the first sprocket is fixed to the outer peripheral surface;

The drive motor is fixed with a second sprocket on the drive shaft;

The first sprocket and the second sprocket are connected by a chain so that the combustion drum is rotated by the operation of the drive motor.

In addition, in the present invention, the combustion drum is intermittent rotation operation by the operation of the drive motor, the intermittent rotation operation is rotated for 1 to 3 seconds at intervals of 30 to 35 seconds, the problem solution means for the burner burner. It is done.

In the present invention, a burner for a pellet boiler characterized in that at least one combustion ball is introduced into the combustion drum as a means for solving the problem.

On the other hand, in the present invention, the combustion drum is a pellet boiler burner characterized in that the front and rear outer circumferential surface is seated on the roller installed on the front and rear inner wall of the combustion chamber so as to be rotatably supported. do.

And, in the present invention, the pellet supply pipe for injecting the fuel pellet, is inclined connected to the rear of the combustion casing via the air chamber on the upper surface of the air supply casing;

On the pellet supply pipe via the air chamber, the burner for pellet boiler characterized in that it is provided with the backfire prevention tube which injects the air injected into the air chamber into the pellet supply pipe, and injects it into the combustion drum.

In the present invention as described above, the flashback tube, the inner diameter of the upper end is formed larger than the outer diameter of the pellet supply pipe adjacent to the upper surface of the air supply casing to form an air inlet, the lower end of the upper end of the pellet supply pipe adjacent to the back of the combustion casing A pellet boiler burner characterized by being connected to the above is used as a problem solving means.

And, in the present invention, the flame arrester tube is a pellet boiler burner characterized in that at least one is provided on the pellet supply pipe via the air chamber as a problem solving means.

The burner for the pellet boiler according to the present invention allows the combustion drum to be rotated by the drive motor, so that a certain amount of pellets contained inside the combustion drum are mixed and mixed with each other, and the ash generated during the combustion of the pellet is the inner surface of the combustion drum. It is characteristic that it does not accumulate in.

Thus, by rotating the combustion drum during the combustion of the pellets, it is possible to achieve complete combustion of the fuel pellets, there is an effect that can maximize the thermal efficiency.

In addition, the present invention is able to prevent the ash generated during combustion accumulated on the inside of the combustion drum and petrified, it is expected to reduce the fuel cost and the maintenance cost of the pellet boiler.

Figure 1 is a side cross-sectional view showing the internal configuration of the burner for pellet boiler according to a preferred embodiment of the present invention.
Figure 2 is a planar cross-sectional view showing the internal configuration of the burner for pellet boiler according to a preferred embodiment of the present invention.
3 is a cross-sectional view taken along the line AA ′ of FIG. 1.
4 is a cross-sectional view taken along line BB ′ of FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the drawings and detailed descriptions of the construction and operation which can be easily understood by those skilled in the art from a general burner for a boiler, Briefly or omitted.

In particular, in the drawings and detailed description of the drawings, detailed descriptions and illustrations of specific technical configurations and operations of elements not directly related to technical features of the present invention will be omitted, and only the technical configurations related to the present invention will be briefly shown. Explained

In the burner for a pellet boiler according to the present invention, in a burner for a pellet boiler which burns fuel pellets introduced into the combustion casing 10 and releases thermal energy generated by combustion of the pellets into the heat exchange chamber of the pellet boiler,

The present invention is provided with a combustion drum (30) rotatably installed inside the combustion casing (10), and a pellet supply pipe (50) for introducing fuel pellets into the combustion drum (30).

In addition, an ignition device 70 for igniting fuel pellets injected into the combustion drum 30, a blower fan 80 for supplying external air to smoothly burn the fuel pellets, and a combustion drum for combustion of the fuel pellets It consists of a drive motor 40 for rotating the operation (30).

The burner for the pellet boiler according to the present invention allows the combustion drum 30 to be rotated by the drive motor 40, so that a certain amount of pellets accommodated inside the combustion drum 30 can be mixed and burned evenly. It is characterized in that the ash generated during the combustion does not accumulate on the inner surface of the combustion drum 30, which will be described in detail with reference to the accompanying drawings.

In the burner for pellet boiler which burns fuel pellets injected into the combustion drum 30 and discharges thermal energy generated by combustion of the pellets into the heat exchange chamber of the pellet boiler,

In the burner for a pellet boiler according to the preferred embodiment of the present invention, the combustion drum 30 is rotatably installed on the inside thereof, and thermal energy generated from the combustion drum 30 on the front surface thereof can be discharged into the heat exchange chamber. Combustion casing 10 is formed with a discharge hole 12 is provided.

Then, the open front is coupled to the rear of the combustion casing 10, there is provided an air supply casing 20 is formed with an air chamber 21 is injected into the outside air.

As described above, the present invention includes a combustion casing 10 positioned inside the heat exchange chamber of the pellet boiler and an air supply casing 20 positioned outside the heat exchange chamber. Is connected to the rear of the pellet feed pipe 50 for injecting fuel pellets into the combustion drum 30 is provided.

Then, the ignition device 70 is coupled to the combustion casing 10 rear surface to ignite the fuel pellets injected into the combustion drum 30.

In addition, a blowing fan 80 coupled to the rear surface of the air supply casing 20 for injecting external air into the air chamber 21 is provided.

In addition, the burner for the pellet boiler according to the present invention is provided with a drive motor 40 coupled to the rear surface of the air supply casing 20 to rotate the combustion drum 30 connected to the drive shaft 41.

In the burner for a pellet boiler according to a preferred embodiment of the present invention, which can be configured as described above, the combustion drum 30 is formed of a cylindrical porous plate having an open front and rear surfaces, and a first sprocket 31 on an outer circumferential surface thereof. Is fixed.

In addition, the second motor sprocket 42 is fixed on the drive shaft 41, and the first motor sprocket 31 and the second sprocket 42 are connected to each other by the chain 43. By the operation of the combustion drum 30 is rotated.

Here, the combustion drum 30 is intermittently rotated by the operation of the drive motor 40, the intermittent rotation is most preferably rotated for 1 to 3 seconds at intervals of 30 to 35 seconds.

In addition, it is preferable that one or more combustion balls 32 made of iron or the like are introduced into the combustion drum 30.

In addition, the front and rear outer peripheral surfaces of the combustion drum 30 are seated on the rollers 13 provided on the front and rear inner walls of the combustion chamber 11 so as to be rotatably supported.

On the other hand, the pellet supply pipe 50 into which the fuel pellet is introduced is inclinedly connected to the rear surface of the combustion casing 10 via the air chamber 21 on the upper surface of the air supply casing 20.

Then, on the pellet supply pipe 50 via the air chamber 21, the air injected into the air chamber 21 flows into the pellet supply pipe 50 to be injected into the combustion drum 30 inside ( 60).

Here, the flashback prevention tube 60 has an inner diameter of the upper end is larger than the outer diameter of the pellet supply pipe 50 adjacent to the upper surface of the air supply casing 20 to form an air inflow path 61, the lower end of the combustion casing 10 It is connected to the upper end of the pellet supply pipe 50 adjacent to the back of the).

One or more such flashback prevention tube 60 may be provided on the pellet supply pipe 50 via the air chamber 21.

Pellet boiler burner according to a preferred embodiment of the present invention configured as described above is that the combustion casing 10 is mounted into the heat exchange chamber of the pellet boiler, the pellet boiler burner of the present invention in more detail with the operation process. Explain.

In the burner for a pellet boiler according to the preferred embodiment of the present invention, the combustion casing 10 is inserted into the heat exchange chamber of the pellet boiler, and a flange (not shown) formed on the outer circumference of the rear end is in close contact with the outer wall of the heat exchange chamber, and then bolts and the like. Fix it to complete the installation.

Then, when the operator sets the pellet feed amount and the number of revolutions of the combustion drum 30 in the control box (not shown) and operates the pellet boiler, the pellets stored in the hopper (not shown) are burned through the pellet supply pipe 50. 30 is supplied inward.

The pellets falling through the pellet supply pipe 50 are supplied to the combustion drum 30 in a quantitative manner by a metering feeder (not shown) installed in the lower portion of the hopper.

After a certain amount of fuel pellets are injected into the combustion drum 30, the combustion proceeds while ignition is performed by the ignition device 70.

Here, the operator can check the ignition state of the pellet through the flame monitoring port 51 provided at one end of the pellet supply pipe (50).

In addition, the ignition device 70 generates high temperature heat, and transmits high temperature heat to the combustion drum 30 through the ignition tube 71 coupled to the rear surface of the combustion casing 10 to ignite the pellets. .

Such an ignition device 70 is stopped when the temperature sensor (not shown) mounted inside the combustion chamber 11 detects a set ignition temperature.

The ON / OFF operation of the ignition device 70 and the operation of the temperature sensor are general, and a detailed description thereof will be omitted.

In the process of combustion by pellets ignited in the combustion drum 30, the outside air is supplied to the air chamber 21 by the blowing fan 80 coupled to the rear surface of the air supply casing (20).

The air injected into the air chamber 21 is supplied into the combustion chamber 11 through the through hole 14 formed in the rear surface of the combustion casing 10 and is burned through a plurality of holes drilled in the outer surface of the combustion drum 30. The inside of the drum 30 is supplied to smoothly burn the pellets.

In addition, the air injected into the air chamber 21 is supplied into the combustion drum 30 through the ignition tube 71 in which the ignition device 70 is built, so that the combustion of the pellets can be made smoothly.

Then, the air injected into the air chamber 21 is inside the combustion drum 30 through the air inlet 61 of the flashback prevention tube 60 coupled to the pellet supply pipe 50 via the air chamber 21. Is supplied.

The air supplied into the combustion drum 30 through the air inlet 61 of the flashback prevention tube 60 allows the combustion of the pellets to be performed smoothly, while the flame generated inside the combustion drum 30 is supplied to the pellet supply pipe 50. ) To prevent backfire into the interior.

Such a flashback prevention tube 60 is coupled to one or more on the pellet supply pipe 50 via the air chamber 11 so that the air injected into the air chamber 11 can be more smoothly supplied into the combustion drum 30. It is desirable to be able to.

As described above, the combustion drum 30 rotatably installed inside the combustion casing 10 in the process of the combustion of the pellets in the combustion drum 30 is rotated at an appropriate rotational speed by the drive motor 40. do.

The rotation ratio of the combustion drum 30 can be arbitrarily set in the control box of the pellet boiler, the combustion drum 30 is intermittently rotated by the operation of the drive motor 40.

The intermittent rotation of the combustion drum 30 is preferably rotated for 1 to 3 seconds at intervals of 30 to 35 seconds, and most preferably for 1 second at 30 seconds.

Intermittent rotation of the combustion drum 30 allows a certain amount of pellets contained inside the combustion drum 30 to be evenly combusted.

Then, the ash generated during the combustion of the pellets acts to prevent accumulation on the inner surface of the combustion drum 30, thereby increasing the combustion efficiency.

In addition, the ash of the pellet is laminated to the lower portion of the combustion drum 30 by the combustion ball 32 introduced into the combustion drum 30 to prevent the combustion from being disturbed.

Meanwhile, the ash in the form of particles generated inside the combustion drum 30 is pelleted through the discharge hole 12 drilled on the front surface of the combustion casing 10 by the air supplied into the combustion drum 30 in the course of combustion. It is discharged into the heat exchange chamber of the boiler.

Ash discharged into the heat exchange chamber of the pellet boiler is removed through a cleaning discharge hole provided in the bottom of the heat exchange chamber (not shown).

The combustion drum 30 rotates the driving shaft 41 of the driving motor 40 so that rotational force is transmitted to the first sprocket 31 connected by the second sprocket 42 and the chain 43, whereby the combustion drum ( 30) will be rotated.

As described above, a certain amount of pellets injected into the combustion drum 30 are mixed and combusted by the rotating combustion drum 30, and ashes generated during the combustion of the pellets do not accumulate inside the combustion drum 30. In addition, the pellet can be completely burned to maximize thermal efficiency.

As such, the heat energy generated by the combustion of the pellets moves to the heat exchange chamber of the pellet boiler through the discharge hole 12 of the combustion drum 30 to be in contact with the heat exchange pipe, and heat energy is transferred to the water inside the heat exchange pipe. Will be done.

Although a burner for a pellet boiler according to the present invention as described above has been shown in accordance with the above description and the accompanying drawings, it is conventional in the art that various modifications, changes and substitutions are possible without departing from the technical spirit of the present invention. Technicians will be well understood.

Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings.

The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: combustion casing, 11: combustion chamber, 12: exhaust hole, 13: roller, 14: through hole
20: air supply casing, 21: air chamber
30: combustion drum, 31: first sprocket, 32: combustion ball
40: drive motor, 41: drive shaft, 42: second sprocket, 43: chain
50: pellet feed pipe, 51: flame monitor
60: flashback prevention pipe, 61: air inflow path
70: lighting device, 71: lighting pipe
80: blowing fan

Claims (9)

In a burner for pellet boiler which burns fuel pellets introduced into the combustion casing and releases thermal energy generated by combustion of the pellets into the heat exchange chamber of the pellet boiler,
A combustion drum rotatably installed inside the combustion casing;
A pellet supply pipe for injecting fuel pellets into the combustion drum;
An ignition device for igniting fuel pellets injected into the combustion drum;
A blowing fan for supplying outside air to facilitate combustion of the fuel pellets;
And a drive motor for rotating the combustion drum during combustion of the fuel pellets. In a burner for pellet boiler which burns fuel pellets introduced into a combustion drum and releases thermal energy generated by combustion of the pellets into the heat exchange chamber of the pellet boiler,
A combustion casing having an inner side of the combustion drum rotatably installed therein and having a discharge hole formed at a front thereof so that heat energy generated from the combustion drum can be discharged into the heat exchange chamber;
An air supply casing having an open front surface coupled to a rear surface of the combustion casing and having an air chamber into which external air is injected;
A pellet supply pipe connected to a rear surface of the combustion casing from an upper surface of the air supply casing to inject fuel pellets into the combustion drum;
An ignition device coupled to a rear surface of the combustion casing to ignite fuel pellets injected into the combustion drum;
A blowing fan coupled to a rear surface of the air supply casing to inject external air into the air chamber;
And a drive motor coupled to a rear surface of the air supply casing and configured to rotate the combustion drum connected to a drive shaft. 3. The method according to claim 1 or 2,
The combustion drum is formed of a cylindrical porous plate having a front and a rear opening, and a first sprocket is fixed to an outer circumferential surface thereof;
The drive motor is fixed with a second sprocket on a drive shaft;
And the first sprocket and the second sprocket are connected by a chain to rotate the combustion drum by the operation of the drive motor. 3. The method according to claim 1 or 2,
The combustion drum is an intermittent rotation operation by the operation of the drive motor, the intermittent rotation operation is a pellet boiler burner, characterized in that the rotation operation for 1 to 3 seconds at intervals of 30 to 35 seconds. 3. The method according to claim 1 or 2,
Burner for pellet boiler, characterized in that one or more combustion ball is injected into the combustion drum. 3. The method of claim 2,
The combustion drum is a pellet boiler burner, characterized in that the front and rear outer circumferential surface is seated on the roller installed on the front and rear inner wall of the combustion chamber to be rotatably supported. 3. The method of claim 2,
The pellet supply pipe for injecting fuel pellets is inclinedly connected to the rear surface of the combustion casing via the air chamber on the upper surface of the air supply casing;
On the pellet supply pipe passing through the air chamber, the burner for the boiler, characterized in that it is provided with a flashback prevention tube for allowing the air injected into the air chamber to be introduced into the pellet supply pipe and injected into the combustion drum. The method of claim 7, wherein
The flashback prevention tube, the inner diameter of the upper end is formed larger than the outer diameter of the pellet supply pipe adjacent to the upper surface of the air supply casing to form an air inflow path,
Burner for pellet boiler characterized in that the lower end is connected to the upper end of the pellet feed pipe adjacent to the back of the combustion casing. 9. The method according to claim 7 or 8,
The flashback prevention pipe burner for the boiler characterized in that at least one is provided on the pellet supply pipe via the air chamber.

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